Westport, Washington · field elev 14 ft
Density Altitude at Westport (14S)
Westport sits at 14 ft, and even a typical August afternoon (68 °F) only lifts density altitude to about 590 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 43.1 | −1,032 ft | 48.6 | −658 ft |
| February | 44.1 | −963 ft | 51.3 | −476 ft |
| March | 45.9 | −841 ft | 53.4 | −336 ft |
| April | 48.7 | −651 ft | 56.3 | −143 ft |
| May | 53.0 | −362 ft | 60.1 | 108 ft |
| June | 56.6 | −123 ft | 63.5 | 330 ft |
| July | 59.1 | 42 ft | 65.9 | 486 ft |
| August | 59.9 | 95 ft | 67.5 | 590 ft |
| September | 57.8 | −44 ft | 66.7 | 538 ft |
| October | 52.0 | −429 ft | 60.1 | 108 ft |
| November | 46.3 | −814 ft | 52.6 | −389 ft |
| December | 42.7 | −1,059 ft | 48.4 | −671 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for 14S
DENSITY ALTITUDE
Field elevation 14 ft — the air behaves like 622 ft.
- PRESSURE ALT
- 15 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
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- 7W1 — Port Of Ilwaco
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- 8W9 — R & K Skyranch
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- KSHN — Sanderson Field
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- KCLS — Chehalis-Centralia
Chehalis · elev 177 ft
Frequently asked questions
How high does density altitude get at 14S in summer?
On a typical August afternoon — around 68 °F at the nearest NOAA normals station — density altitude at Westport reaches roughly 590 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at 14S on an average day?
It swings with the seasons: from roughly −1,059 ft at the coldest month's average temperature to about 95 ft at the warmest month's — all from a constant field elevation of 14 ft. The month-by-month table above carries the full year.
What is the field elevation of Westport?
14 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 14S (FAA), in Westport, Washington.